Thbrmostatic controller for gas water heaters



Aug. 10., 1926.

-- B. RYAN THERMOSTATIC CONTROLLER FOR GAS WATER HEATERS Oriz'in Filed Nov. 29 1920 Patented Aug. 10, 1926.

UNITED STATES PATENT OFFICE.

BEBNARD RYAN, 0F NEVT YORK, N. Y.

Original application filed November 29, 1920, Serial No. 427,257.

January 2, 1924.

This application is a divisional one from my co-pending application, Serial Number 427,257, filed November 29th, 1920, and has to do with the manner of connecting the thermostat casing with the water reservoir or circulating system, and the principal objects are to eliminate deterioration and corrosion of the thermostat casing through electrolysis, enabling the use of die cast metal in the format-ion of the thermostat casing and thereby simplifying the construction and materially reducing the cost.

The principal feature of the invention consists in securing in the die cast thermostat casing a metal ferrule adapted to support the casing from the water chamber and separate the die cast casing from contact with the water, thereby removing it from any possible electrolytic action, said ferrule being of brass or other material not subject to electrolysis with respect to copper when in contact with water.

The drawing is an elevational part sectional view of a die cast thermostat casing equipped with a connecting ferrule to support the same from the water circulating member.

Prior to the present invention it has been the custom to manufacture thermostats with brass casings and therefore of sand cast structure which requires considerable cleaning and machining. According to the present constructionthe base 1 of the casing 2 is formed of a die casting of a suitable aluminum or zinc alloy and is provided with a boss 3 in which is secured, preferably by being cast therein, a ferrule 4: which projects beyond the boss 3 and is threaded externally to engage the threaded tube or casing 5 in which the circulating water is contained.

The ferrule is threaded internally at its outer end to receive the copper tube 6 which is sealed at its outer end and contains the thermostat carbon rod 7 which operates the Divided and. this application filed Serial- No. 684,030.

thermostat mechanism contained in the casmg 1.

It will be seen from this description that the base 1 of the thermostat casing is entirely separated from any pOSSible contact with the circulating water, consequently there can be no corrosion of the casing through electrolysis and the metal ferrule is of a suitable composition, preferably brass, to successfully re sist corrosive or electrolytic action.

l/Vith the detrimental effects of electrolysis removed through the use of the connecting ferrule it is possible to manufacture the thermostat casing by die casting methods at a very low cost and this enables the placing of a thermostat upon the market at a Very low or moderate cost, rendering its use practically universal.

What I claim as my invention is 1. In a thermostatic controller for gas water heaters, the combination with the water container having an opening therein, of a closure for said opening formed of a metal not subject to electrolysis with respect to copper when in contact with water, a copper thermostatic member secured in said closure in contact with the water, a casing of die-cast metal supported by said closure out of contact with the water in the container, and a control mechanism in said casing operatively connected with the thermostatic member.

2. In a thermostatic controller for gas water heaters, the combination with the water container having an opening therein,

trol mechanism.

BERNARD RYAN. 

